ALSA: ice17xx: Fix inclusion of linux/io.h

Include linux/io.h in ice1712.h since inb() and outb() are used in
inline functions there.  Remove the redundant inclusion of that file
in other places at the same time.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/ice1712/ice1712.h b/sound/pci/ice1712/ice1712.h
index e8b7c5e..b209fc3 100644
--- a/sound/pci/ice1712/ice1712.h
+++ b/sound/pci/ice1712/ice1712.h
@@ -22,6 +22,7 @@
  *
  */
 
+#include <linux/io.h>
 #include <sound/control.h>
 #include <sound/ac97_codec.h>
 #include <sound/rawmidi.h>